Inspection Procedure

WARNING: This page is about a different car, the 2004 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.

READ VALUE OF HAND-HELD TESTER
1. Connect the hand-held tester (with CAN VIM) to the DLC3.
2. Turn the ignition switch ON and press the hand-held tester main switch ON.
3. Select the items below in the DATA LIST and read the displays on the hand-held tester.
  Theft warning ECU:
  
  Fig 1: Hand-Held Tester Display Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
OK:

"OFF" (smart key cancel switch is not pressed) appears on the screen.

NG: Go to step 2

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE (See PROBLEM SYMPTOMS TABLE )
INSPECT SMART KEY CANCEL SWITCH ASSY
1. Remove the smart key cancel switch assy.
2. Measure the switch resistance.
  Standard:
  
  Fig 2: Resistance Specifications
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 3: Identifying Smart Key Cancel Switch Assy
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPLACE SMART KEY CANCEL SWITCH ASSY

OK: Go to next step
CHECK WIRE HARNESS (SMART KEY CANCEL SWITCH ASSY - THEFT WARNING ECU AND BODY GROUND)
1. Disconnect the S45 switch connector.
2. Disconnect the T5 ECU connector.
3. Measure the resistance between the wire harness side connectors.
  Standard:
  
  Fig 4: Resistance Specifications
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 5: Identifying Wire Harness
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPLACE OR REPLACE HARNESS AND CONNECTOR

OK: Go to next step

REPLACE THEFT WARNING ECU